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tsuomela : systems   45

[1305.6700] Early warning signals: The charted and uncharted territories
"The realization that complex systems such as ecological communities can collapse or shift regimes suddenly and without rapid external forcing poses a serious challenge to our understanding and management of the natural world. The potential to identify early warning signals that would allow researchers and managers to predict such events before they happen has therefore been an invaluable discovery that offers a way forward in spite of such seemingly unpredictable behavior. Research into early warning signals has demonstrated that it is possible to define and detect such early warning signals in advance of a transition in certain contexts. Here we describe the pattern emerging as research continues to explore just how far we can generalize these results."
complexity  ecology  environment  systems 
june 2013 by tsuomela
If systems were fishes we’d all something something | Notional Slurry
"But the inter­est­ing thing, to me, is that in stir­ring the pot of soci­ol­ogy, Mar­tin has wielded the same spoon I’ve been wav­ing for years in… well, what­ever the hell my “field” is. “Genetic pro­gram­ming” maybe (have I told you how much I dis­like the phrase yet today?), or machine learn­ing, or arti­fi­cial intelligence.

That is: the Spoon of Re-​​drawing Sys­tem Bound­aries to Include the User as an Inte­gral Part of the Sys­tem. [Or, as I like to call it, SpoRSyBoIUIPotS]"
systems  complexity  user  center  periphery  explanation  social-science 
june 2012 by tsuomela
Efficiency vs. Robustness: On Scott’s Seeing Like a State « A (Budding) Sociologist’s Commonplace Book
"To rehash briefly, complex systems biologist Jack Cohen argued that many failures in complex systems can be attributed to the hyper-emphasis on efficiency at the expense of robustness. Apparently inefficient systems are often useful under specific, but uncommon circumstances. Thus, removing these systems will increase efficiency in normal times, but promote dramatic failures under other conditions.

I was thinking about this distinction while reading James Scott’s fantastic 1998 book, Seeing Like a State."
efficiency  robust  systems  complexity  power  sociology  politics 
march 2011 by tsuomela
The military failure machine — Crooked Timber
"But the striking thing about military expenditure is that its failure rate is so high. More or less by definition, it’s impossible for both sides to win an armed conflict, but it’s certainly possible (and probably the par outcome) for both sides to lose. So, the US success rate since 1950 is probably about what would be expected."
military-industrial-complex  military  america  systems  education  failure 
january 2011 by tsuomela
IIIS - International Institute of Informatics and Systemics
To contribute to the identification of synergetic relationships among the areas of The Systems Approach, Cybernetics, and Informatics, as well as between them and society.
systems  communication  cybernetics  professional-association  conference  globalization  institutions 
november 2010 by tsuomela
Dr. Gordon Pask on Cybernetics
Defined by Norbert Wiener in 1948 as the science of communication and control in the animal and the machine, cybernetics has been more or less broadly interpreted.
cybernetics  definition  encyclopedia  reference  control  systems  feedback  history 
november 2010 by tsuomela
Econometric Measures of Systemic Risk in the Finance and Insurance Sectors
We propose several econometric measures of systemic risk to capture the interconnectedness among the monthly returns of hedge funds, banks, brokers, and insurance companies based on principal components analysis and Granger-causality tests. We find that all four sectors have become highly interrelated over the past decade, increasing the level of systemic risk in the finance and insurance industries. These measures can also identify and quantify financial crisis periods, and seem to contain predictive power for the current financial crisis. Our results suggest that hedge funds can provide early indications of market dislocation, and systemic risk arises from a complex and dynamic network of relationships among hedge funds, banks, insurance companies, and brokers.
economics  complexity  systems  risk  measurement  modeling  interconnection  social-networks  network-analysis  finance 
august 2010 by tsuomela
In Finance We Distrust - Project Syndicate
But in a complex system in which expertise, insight, and real-time information are not concentrated in one place, and certainly not in government and regulatory circles, reliance on such a framework seems deficient and unwise. Moreover, it ignores the importance of trust. A better starting point, I believe, is the notion of shared responsibility for the stability of the system and its social benefits – shared, that is, by participants and regulators.

It is striking that no senior executive of whom I am aware has laid out in any detail how his or her institution’s expertise could be deployed in pursuit of the collective goal of stability. The suspicion that underlies much of today’s public anger is that these institutions, having influenced the formulation of the legal and ethical rules, could do more to contribute to stability than just obey them.
finance  financial-services  economics  regulation  trust  complexity  systems 
july 2010 by tsuomela
Ming the Mechanic: Truth: superconductivity for scalable networks
Masses of people who need to keep up appearances, trying to adhere to norms they never consciously agreed to, are relatively easy to control. They can be rendered rather harmless, as they each pursue individual rewards that don't truly match what they need and want.

If we make collaborative tools that simply reinforce our inclination to keep up appearances, they won't go far. If they only help us exchange impressively sounding declarations, abstract positions and lists of accomplishments, they won't have accomplished much.

Collective intelligence has something to do with increasing the number of opportunities for stuff to connect up, and lowering the resistance to it happening. Lacking or incorrect information are forms of resistance. Correct and complete information decreases resistance and increases connections.
truth  collective-intelligence  collaboration  systems 
july 2010 by tsuomela
JWSR Journal of World-Systems Research (JWSR)
A journal of the Political Economy of the World-System Section of the American Sociological Association. Support and assistance provided by the Institute for Research on World-Systems, North Carolina State University, and the University of Utah.
journal  world-systems  systems  international  academic 
december 2009 by tsuomela
Access : Early-warning signals for critical transitions : Nature
Complex dynamical systems, ranging from ecosystems to financial markets and the climate, can have tipping points at which a sudden shift to a contrasting dynamical regime may occur. Although predicting such critical points before they are reached is extremely difficult, work in different scientific fields is now suggesting the existence of generic early-warning signals that may indicate for a wide class of systems if a critical threshold is approaching.
complexity  science  dynamics  systems  prediction  early-warning  change 
september 2009 by tsuomela
Technology Review: Blogs: arXiv blog: First rule of ant traffic: no overtaking
So what's the secret? John and his mates aren't entirely sure but they've found a pretty good clue: ants never overtake. Not ever. Instead they form into platoons in which all the ants move at the same speed. Increase the density of ant traffic and the platoons simply join together to form larger groups. This is how the velocity remains the same while the density increases. That makes ant traffic significantly different from other types of traffic in which congestion occurs, such as road traffic and internet packet traffic.
complexity  ants  biology  systems  traffic 
march 2009 by tsuomela
[0901.2203] Neural Networks as dynamical systems
We consider neural networks from the point of view of dynamical systems theory. In this spirit we review recent results dealing with the following questions, adressed in the context of specific models. 1. Characterizing the collective dynamics
biology  neuralnetworks  neurology  model  dynamics  systems  complexity 
february 2009 by tsuomela
Airline industry in a jam | Chicago Tribune
Flight 1073 shows how easy it is for a situation to go from bad to worse, especially when carriers operate with little, no slack
systems  air-travel-failure  chaos  outsourcing  complexity  business  via:brianalexander 
june 2007 by tsuomela
Segue Project Page > Features > About Segue
Segue is an open source content management system designed for e-learning that combines the ease of use of course management systems with the flexibility of weblogs for creating various types of sites including course, news, journal, peer review and e-por
php  open-source  lms  education  online  systems 
may 2007 by tsuomela
Orcinus - Kauffman's Rules, 1-7
systems that all of them -- economic, ecological, biological, political, cultural, or mechanical -- succeed or fail in much the same way...Draper Kauffman set down 28 rules that seem to apply to the behavior of all kinds of systems.
systems  theory  complexity  lists 
march 2007 by tsuomela

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